Oklahoma City fire Maj. Dane Yaw said to combat these 100 degree plus temperatures, firefighters try to drink at least 30 ounces of water each hour when they are on their shift.

He said however, because of the heavy gear they wear, it’s still hard to stay hydrated.

“What we do is work 20 minutes. We’ll then pull out and set up a rehab station, guys that come off that front line, they’ll do their heart rates and blood pressure. And if our temperature is above 110.6, and our heart rate is above 110, we can’t go back in that environment.”